Johnson Controls LP-FXVMA Series User manual

FXVMA Installation Instructions 1

Applications

This document covers the mounting and wiring of the

FXVMA Variable Air Volume (VAV) Box Controller. For

more information about programming, configuring,

downloading, and/or commissioning the FXVMA, refer

to the FXVMA VAV Box Controller Technical Bulletin

(LIT-12011249).

The FXVMA is a VAV box controller in the Facility

Explorer line of products. The FXVMA is an integrated

assembly consisting of a high performance digital

controller, fast response actuator, and an accurate

Differential Pressure Transducer (DPT), all of which are

pre-wired together and integrated inside a single

enclosure.

The FXVMA is fully programmable using FX Builder, or

you can select and configure a pre-defined VAV box

control application using FX Builder Express.

Various software and accessories are available to

assist you during the commissioning of the FXVMA and

the VAV box. This includes FX CommPro, which has

computer-based downloading and commissioning

capabilities; and the Medium User Interface, which has

an easy-to-use hardware interface.

The FXVMA includes an embedded communication

capability that enables the FXVMA to integrate into an

N2 or BACnet® Master-Slave/Token-Passing (MS/TP)

(depending on model) network of a building automation

system.

North American Emissions Compliance

United States

Canada

Figure 1: FXVMA VAV Box Controller

This equipment has been tested and found to

comply with the limits for a Class A digital device

pursuant to Part 15 of the FCC Rules. These limits

are designed to provide reasonable protection

against harmful interference when this equipment is

operated in a commercial environment. This

equipment generates, uses, and can radiate radio

frequency energy and, if not installed and used in

accordance with the instruction manual, may cause

harmful interference to radio communications.

Operation of this equipment in a residential area is

likely to cause harmful interference, in which case

the user will be required to correct the interference

at his/her own expense.

This Class (A) digital apparatus meets all the

requirements of the Canadian Interference-Causing

Equipment Regulations.

Cet appareil numérique de la Classe (A) respecte

toutes les exigences du Règlement sur le matériel

brouilleur du Canada.

FXVMA

Installation Instructions

LP-FXVMAxx-x Part No. 24-10143-47, Rev. D

Issued April 16, 2009

Supersedes February 4, 2008

FXVMA Installation Instructions2

Installation

Observe these guidelines when installing the FXVMA:

• Transport the FXVMA in its original container to

minimize vibration and shock damage.

• Do not drop the FXVMA or subject it to physical

shock.

Accessories

Use Table 1 to order accessories.

Mounting

To mount the FXVMA:

1. Place the FXVMA in the proper mounting position

on the damper shaft so that the wiring connections

are easily accessible.

2. Make sure the FXVMA base is parallel to the VAV

box (perpendicular to the damper shaft). If needed,

use a spacer to offset tipping of the FXVMA caused

by the shaft bushings.

3. Secure the self-piercing No.10 screw through the

FXVMA mounting slot with a power screwdriver

and 100 mm (4 in.) extension socket; otherwise,

use a punch to mark the position of the shoulder

washer and then drill a hole into the VAV box using

a 3.5 mm (9/64 in.) drill bit.

4. Insert and tighten the mounting screw against the

washer.

5. Locate the damper position using the typical

marking on the end of the damper shaft (Figure 2).

6. Note the direction, Clockwise (CW) or

Counterclockwise (CCW), required to close the

damper.

7. Grasp the damper shaft firmly with pliers and either

manually close the damper for 90° boxes or

manually open for 45° or 60° boxes.

8. Push down and hold the Manual Override button,

and turn the FXVMA coupler until it contacts the

mechanical end-stop at either the fully closed (90°

boxes) or fully open (45° and 60° boxes) position.

Table 1: FXVMA Accessories Ordering

Information

Product

Code

Number

Description

Y64T15-0 Transformer: 120/208/240 VAC Primary

to 24 VAC Secondary, 92 VA, Foot

Mount, 30 in. Primary Leads and 30 in.

Secondary Leads, Class 2

Y65A13-0 Transformer: 120 VAC Primary to

24 VAC Secondary, 40 VA, Foot Mount,

8 in. Primary Leads and 30 in.

Secondary Leads, Class 2

Y65T42-0 Transformer: 120/208/240 VAC Primary

to 24 VAC Secondary, 40 VA, Hub

Mount, 8 in. Primary Leads and

Secondary Screw Terminals, Class 2

Y65T31-0 Transformer: 120/208/240 VAC Primary

to 24 VAC Secondary, 40 VA, Hub

Mount, 8 in. Primary Leads and

Secondary Screw Terminals, Class 2

AP-TBK1002-0 2-position screw terminal that plugs into

spade lugs

AP-TBK1003-0 3-position screw terminal that plugs into

spade lugs

IMPORTANT: When the air supply to the VAV box

is below 10°C (50°F), make sure that any

condensation on the VAV box (particularly on the

damper shaft) does not enter the electronics. Mount

the FXVMA vertically above the damper shaft to

allow any shaft condensation to fall away from the

FXVMA. Additional measures may be required in

some installations.

IMPORTANT: Do not overtighten the screws, or the

threads may strip. If you plan to mount to the VAV

box, make sure the screws do not interfere with

damper blade movement.

Figure 2: Typical Damper End Shaft Icons

FIG:d_shaft

FXVMA Installation Instructions 3

9. For 90° boxes, rotate the coupler in the direction

that the damper closes with the mechanical limit.

The open end-stop is automatically set for 90°

boxes.

You must provide hard stops for 45° and 60° boxes

at both fully closed and fully open damper

positions. By installing the FXVMA at the fully open

position, the FXVMA provides the open stop for the

box. The closed damper seal provides the fully

closed stop.

10. Tighten the square coupler bolt to 17 to 21 N·m

(150 to 185 lb·in.).

11. Loop the pneumatic tubing to include a trap for

condensation. Attach the tubing from the FXVMA to

the VAV box flow pickup. The red tubing is

connected to the inlet or high pressure side and the

clear tubing is connected to the low pressure side.

12. Push the Manual Override button, and turn the

actuator coupling manually to ensure that the

actuator can rotate from full closed to full open

positions without binding.

13. Complete the mounting by rotating the damper to

the full open position.

Wiring

To wire the FXVMA:

1. Wire the analogand binary Inputs/Outputs (I/Os) to

the FXVMA.

2. Wire the Network Room Module (NRM) to the

FXVMA.

3. Daisy-chain the N2 or BACnet MS/TP bus to the

FXVMA’s Supervisory Link.

4. Connect power wiring to the FXVMA.

The channel assignments for the inputs and outputs

vary according to the control application configuration.

Obtain the actual I/O channel assignments from

FX Builder Express or FX Builder.

The wiring connections for the inputs and outputs vary

depending on the FXVMA application.

Universal Input Wiring Details

The FXVMA features one Universal Input (UI) that you

can configure to accept either a passive sensor, an

active sensor, or a maintained dry contact switch input.

Passive Sensor Connection

The UI accepts a 0-600k ohm input signal from a

passive (resistive type) sensor. The UI has an internal

12 V, 15k ohm pullup. See Figure 3.

CAUTION: Risk of Property Damage.

Rotate the damper to the fully open

position before starting the air handler.

Failure to rotate the damper to the full

open position may result in damage to

the Variable Air Volume box or ductwork

when the air handler is started.

Table 2: FXVMA Universal Input Description

Terminal

Label Function and Electrical Ratings/

Specifications

+15 V Sources 15 VDC power for active

devices

35 mA total current

IN 0-10 V Analog Input for active sensors

Internal 75k ohm pulldown

0-600k ohm Analog Input for passive

sensor (resistive temperature sensor)

Internal 12 V, 15k ohm pullup

Dry contact Binary Input

Internal 12 V, 15k ohm pullup

ICOM Signal common for IN terminal (isolated

from all other terminal commons)

Figure 3: Passive Sensor Connection

RTD TEMPERATURE

ELEMENT

+15

ICOM

UNIVERSAL

FXVMA

FIG: PassiveSensor

FXVMA Installation Instructions4

Active Sensor Connection

The UI accepts a 0-10 VDC input signal from an active

sensor. The UI has an internal 75k ohm pulldown. The

active sensor can be powered externally; alternatively,

the FXVMA provides 15 VDC, 35 mA power to power

the sensor locally. See Figure 4 and Figure 5.

Dry Contact Switch Connection

The UI accepts a dry contact switch input with a 1 s

minimum pulse width (0.5 Hz at 50% duty cycle). The

UI has an internal 12 V, 15k ohm pullup.

Binary Output Wiring Details

The FXVMA features three field-connectable binary

outputs. These binary outputs are 24 VAC, 0.5 A triacs

that you can configure to control on/off devices (such

as fans, 2-position valves, and heating elements) or

incremental actuators.

Use Figure 7, Figure 8, and Figure 9 to make the

appropriate wiring connections to the Binary Outputs.

Refer to the configured FXVMA application

documentation for actual Binary Outputs used.

Figure 4: Active Sensor Connection

(Powered Externally)

+15

ICOM

UNIVERSAL

FXVMA

DEDICATED

24V SUPPLY

ACTIVE

SENSOR

Figure 5: Active Sensor Connection (Powered

by the FXVMA)

Ground

(Common)

Power

Output

ACTIVE

SENSOR

+15

ICOM

UNIVERSAL

FXVMA

FIG: ActiveSensorVMA

Figure 6: Dry Contact Maintained Switch

Connection

MAINTAINED SWITCH

DRY CONTACT

(N.O. or N.C. as required)

+15

ICOM

UNIVERSAL

FXVMA

FIG: dry contact

Table 3: FXVMA Binary Output Description

Terminal

Label Function and Electrical Ratings/

Specifications

OUTX Sources 24~ Power (hot)

OCOMX Binary Output (24 VAC triac)

• When the binary output is activated,

OCOMX is connected to 24~ Power

(com).

• 30 VAC maximum output voltage

• 0.5 A maximum output current

• 40 mA minimum load current

Figure 7: Binary Output Connection to a

Single On/Off Device

FIG:bin_out

OUT1

OCOM1

OUT2

OCOM2

OUT3

OCOM3

FXVMA ON/OFF

BINARY

Figure 8: Binary Output Connection to Multiple

On/Off Devices

OUT1

OCOM1

OUT2

OCOM2

OUT3

OCOM3

BINARY

FXVMA STAGE 1

STAGE 2

STAGE

ON/OFF

DEVICES

BINARY OUTX ARE 24 VAC (HOT)

OCOMX are internally switched to 24 VAC common.

Figure 9: Binary Output Connection to an

Incremental Actuator

FIG: BinaryOutputIncremental

OUTX

OCOMX

OUTX

OCOMX

BINARY

HTG-O

TERMINATIONS FOR

2 WAY / 3 WAY COIL-B

VALVE

CONFIGURATIONS HTG-O

TERMINATIONS FOR

3WAYCOIL-A

VALVE

CONFIGURATION

COM

CCW

COM

CCW

FXVMA

INCREMENTAL

ACTUATOR

FXVMA Installation Instructions 5

Configurable Output Wiring Details

The FXVMA features two field-connectable outputs that

you can configure to control on/off devices (such as

fans, 2-position valves, or heating elements),

incremental actuators (such as incremental valves), or

0-10 VDC proportional actuators (such as proportional

valves).

On/Off Device Connection

The configurable outputs are connected to on/off

devices as shown in Figure 10. The FXVMA provides

24 VAC, 0.5 A triacs to operate on/off devices.

Incremental Actuator Connection

The configurable outputs are connected to incremental

outputs as shown in Figure 11. The FXVMA provides

24 VAC, 0.5 A triacs to operate incremental actuators.

Proportional Actuator Connection

The configurable outputs are connected to proportional

(0-10 VDC) outputs as shown in Figure 12. The output

load minimum resistance must be 1k ohm.

Table 4: FXVMA Configurable Output Description

Terminal

Label Function and Electrical Ratings/

Specifications

OUTX Analog Output

• Sources 0-10 VDC

• External 1k ohm minimum load

required

• 10 mA maximum output current

Binary Output (24 VAC triac)

• When the binary output is activated,

OUTX is connected to OCOMX

• 30 VAC maximum output voltage

• 0.5 A maximum output current

• 40 mA minimum load current

OCOMX Analog Output common

• Provides the signal common for

Configurable Output terminals when

the CO is configured for analog

output operation.

• Isolated from all other terminal

commons.

Binary Output common

• Provides the signal common for

Configurable Output terminals when

the CO is configured for Binary

Output operation.

• Isolated from all other terminal

commons including CO terminal

commons.

Figure 10: Configurable Output Connection to

an On/Off Device

OUT4

OCOM4

OUT5

OCOM5

CONFIGURABLE

HOT

COM

24~

GROUND

480/277/240/

208/120/24/

24VAC

FXVMA ON/OFF

DEVICE

FIG: Configurab;eOutputOnOff

Figure 11: Configurable Output Connection to

an Incremental Actuator

FIG: ConfigurableOutputIncremental

OUT4

OCOM4

OUT5

OCOM5

CONFIGURABLE

HOT

COM

24~

GROUND

480/277/240/

208/120/24/

24VAC

INCREMENTAL

ACTUATOR

CCW

COM

FXVMA

Figure 12: Configurable Output Connection to

a Proportional Actuator

FIG: ConfigurableOutputProportional

OUT4

OCOM4

OUT5

OCOM5

CONFIGURABLE

HOT

COM

24~

GROUND

480/277/240/

208/120/24/

24VAC

PROPORTIONAL

ACTUATOR

24 V

COM

FXVMA

FXVMA Installation Instructions6

Network Room Module (NRM) Wiring Details

The NRM connects to the Remote Display Bus of the

FXVMA at the 4-terminal connection marked SENSOR.

You can connect the NRM up to 30.5 m (100 ft) from

the FXVMA.

Use Figure 13 to make the wiring connections between

the FXVMA and the NRM.

Supervisory Link Wiring Details

N2 Bus Wiring Details

The N2 bus is a communications network consisting of

three wires carrying RT+, RT-, and REF signals. For

more information on the N2 bus, refer to the N2

Communication Bus Technical Bulletin (LIT-636018).

N2 devices, including the FXVMA, are networked

together in a daisy-chain configuration. For runs up to

1,520 m (5,000 ft), we recommend you use stranded

22 AWG, twisted 3-conductor wire. Avoid using solid

wire when possible, as it is prone to break when pulled.

The N2 bus may be extended to a maximum length of

4,568 m (15,000 ft) using two repeaters.

Use Figure 14 to make the N2 bus connections to the

FXVMA.

BACnet MS/TP Bus Wiring Details

The BACnet MS/TP bus is a communications network

consisting of three wires carrying RT+, RT-, and REF

signals. For more information onthe rules of the MS/TP

Communications Bus, refer to the MS/TP

Communications Bus Technical Bulletin

(LIT-12011034).

Use Figure 14 to make the BACnet MS/TP bus

connections to the FXVMA.

BACnet MS/TP devices, including the FXVMA, are

networked together in a daisy-chain configuration. For

runs up to 1,220 m (4,000 ft), we recommend you use

stranded 22 AWG, twisted 3-conductor wire. Avoid

using solid wire when possible as it is prone to break

when pulled.

Power Wiring Details

The FXVMA requires 24 VAC power. Use Figure 15 to

make power wiring connections.

Setup and Adjustments

Setting the N2 Address

The N2 address switch sets a unique address for the

FXVMA on the N2 bus.

Set the N2 address using the DIP switches on the face

of the FXVMA. The address equals the sum of the

numbers set to ON. For example, if the first (1), the

third (4), and the fifth (16) DIP switches are set to ON,

the device address is 21 (1 + 4 + 16 = 21). Use

addresses 3-255. See Figure 16.

Figure 13: NRM Connection

RT+ RT- COM

PWR

LL -

LL +

SENSOR

COM

NETWORK ROOM

MODULE

PWR

FXVMA

FIG: nrmconnection

Figure 14: N2 or BACnet MS/TP Bus Wiring

SHLD

RT -

RT +

SUPERVISORY LINK

TO NEXT N2 OR

BACNET DEVICE

FROM LAST N2 OR

BACNET DEVICE

COM

FXVMA

Figure 15: Power Wiring Connections

HOT

COM

24~

GROUND

480/277/240/

208/120/24/

24VAC

WHERE 2 OR MORE DEVICES

SHARE A SINGLE

TRANSFORMER, MAINTAIN

POLARITY (COM TO COM)

BETWEEN DEVICES

FXVMA

FIG: wiringconnections

Figure 16: Setting the DIP Switches to Address 21

128

FIG:FXVMAAddress

FXVMA Installation Instructions 7

Setting the BACnet MS/TP MAC Address

The BACnet MS/TP MAC address switch sets a unique

address for the FXVMA on the BACnet MS/TP bus.

Set the BACnet MS/TP MAC address using the DIP

switches on the face of the FXVMA. The address

equals the sum of the numbers set to ON. For

example, if the first (1), the third (4), and the fifth (16)

DIP switches are set to ON, the device address is 21

(1 + 4 + 16 = 21). Use addresses 1-128. See Figure 16.

Setting the End-of-Line (EOL) Switch

Move the End-of-Line (EOL) termination switch to its

On position when the FXVMA is at the end of the

daisy-chain of devices on the N2 or BACnet MS/TP

bus; otherwise, leave it at its default Off position. See

Figure 17.

Troubleshooting

Use Table 5 to troubleshoot the FXVMA.

Repair Information

If the FXVMA Variable Air Volume Box Controller fails

to operate within its specifications, refer to the FXVMA

VAV Box Controller Technical Bulletin (LIT-12011249)

for a list of repair parts available.

Figure 17: EOL Switch

ON Position OFF Position

EOL_Switch.cdr

Table 5: FXVMA Light-Emitting Diode (LED)

Codes

LED Description

Power Green

On when powered

Off when not powered

Fault Red

On during a reset

Off when the application is loaded and

operating correctly

Flashing when application is not

operating correctly or when the

application is in test mode

R/T

(Supervisory) Green

Flashes when FXVMA transmits data to

a supervisor.

Turns off when the FXVMA receives

data.

Published in U.S.A. www.johnsoncontrols.com

FXVMA Installation Instructions8

Johnson Controls® is a registered trademark of Johnson Controls, Inc.

Building Efficiency

507 E. Michigan Street, Milwaukee, WI 53202

Technical Specifications

FXVMA

Product Code Number LP-FXVMA##-#

Supply Voltage 20-30 VAC at 50 or 60 Hz (24 VAC Nominal), Class 2

Power Consumption 10 VA typical, 14 VA maximum

Power delivered to devices connected to the binary outputs (valves, relays, and similar

devices) is not included in this rating.

Ambient Operating Conditions 0 to 50°C (32 to 122°F)

Ambient Storage Conditions -40 to 70°C (-40 to 158°F)

Terminations 6.3 mm (1/4 in.) spade lugs-except communications and 24 VAC power, which are screw

terminals

Controller Addressing 3-255 for N2

1-128 for BACnet MS/TP

Communications Bus N2. For more information, refer to the N2 Communications Bus Technical Bulletin

(LIT-636018).

BACnet MS/TP. For more information, refer to the MS/TP Communication Bus Technical

Bulletin (LIT-12011034).

Mounting Mounts to VAV box damper shaft using single set screw and to duct with single mounting

screw.

Actuator Rating 4 N·m (35 lb·in) minimum; Minimum shaft length = 44 mm (1 3/4 in.)

Dimensions Width: 182 mm (7.2 in.)

Length: 182 mm (7.2 in.)

Height: 64 mm (2.5 in.)

Center of Output Hub to Center of Anti Rotation Slot: 160 mm (6.3 in.)

Weight 0.86 kg (1.9 lb)

Compliance United States – UL Listed, File E107041, CCN PAZX, UL 916 Energy

Management Equipment

Canada – UL Listed, File E107041, CCN PAZX7, CAN/CSA C22.2

No. 205 Signal Equipment

– Industry Canada Compliant, ICES-003

Europe – CE Mark, EMC Directive 89/336/EEC, in accordance

with EN 61000-6-3 (2001) Generic Emission Standard

for Residential and Light Industry and EN 61000-6-2

(2001) Generic Immunity Standard for Heavy Industrial

Environment, and the Low Voltage Directive 73/23/EEC

in accordance with EN 60730-1 (1999) Automatic

electrical controls for household and similar use.

BACnet International – Bacnet Testing Laboratories™ (BTL) 135-2004 Listed

BACnet Application Specific Controller (Pending)

The performance specifications are nominal and conform to acceptable industry standard. For application at conditions beyond these

specifications, consult the local Johnson Controls® office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication

or misuse of its products.

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